Note from マイコー/Michael: due to a potentially severe illness, it is quite possible that I will not be able to respond to bug reports in a timely manner. However, I do encourage you to post here, as there are many wonderful members of our community who should be able to help.
All the schedules suddenly stopped sending kanjis questions, and started giving a lot of kana exercises.
When i looked the stats, they are showing this.
I changed settings to not show kana - meanings exercises and all questions are gone, and all words were "not possible to study because i don't learned their kanjis".